Tap water hardness in North Denmark
We have published hardness data for 49 cities in North Denmark. The median is 10.8 °dH; the hardest water is in Brovst (15.9 °dH), the softest in Byrum (5.3 °dH).
98 % of these cities have hard or very hard water (over 120 mg/L).
Danish waterworks report hardness in °dH; GEUS classes: soft < 8, medium hard 8–12, fairly hard 12–18, hard 18–30, very hard > 30 °dH. Most Danish tap water is groundwater and hard.
Cities in North Denmark, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Brovst | 15.9 | 285 | very hard |
| Hirtshals | 15.1 | 270 | very hard |
| Løkken | 14.9 | 266 | very hard |
| Hurup | 14.7 | 262 | very hard |
| Storvorde | 14.6 | 261 | very hard |
| Hals | 14.1 | 252 | very hard |
| Klarup | 14.1 | 251 | very hard |
| Thisted | 13.9 | 248 | very hard |
| Aalborg | 13.5 | 241 | very hard |
| Gistrup | 13.2 | 237 | very hard |
| Hjørring | 13 | 232 | very hard |
| Nørresundby | 12.8 | 229 | very hard |
| Vadum | 12.8 | 229 | very hard |
| Åbybro | 11.9 | 212 | very hard |
| Arden | 11.7 | 209 | very hard |
| Løgstør | 11.7 | 209 | very hard |
| Sindal | 11.7 | 209 | very hard |
| Brønderslev | 11.5 | 205 | very hard |
| Frejlev | 11.4 | 204 | very hard |
| Kås | 11.4 | 204 | very hard |
| Hadsund | 11.3 | 202 | very hard |
| Gandrup | 11.2 | 201 | very hard |
| Vrå | 11 | 196 | very hard |
| Tårs | 10.9 | 195 | very hard |
| Nykøbing Mors | 10.8 | 193 | very hard |
| Skørping | 10.6 | 189 | very hard |
| Tylstrup | 10.3 | 184 | very hard |
| Pandrup | 10.2 | 182 | very hard |
| Fjerritslev | 10.1 | 180 | very hard |
| Vester Hassing | 9.9 | 177 | hard |
| Mariager | 9.7 | 173 | hard |
| Støvring | 9.4 | 168 | hard |
| Farsø | 9.3 | 166 | hard |
| Vestbjerg | 9.3 | 166 | hard |
| Dronninglund | 9.2 | 164 | hard |
| Klitmøller | 9.2 | 164 | hard |
| Nibe | 9.1 | 162 | hard |
| Elling | 9 | 161 | hard |
| Frederikshavn | 9 | 161 | hard |
| Nørager | 9 | 161 | hard |
| Sæby | 9 | 161 | hard |
| Skagen | 8.5 | 152 | hard |
| Vodskov | 8.5 | 152 | hard |
| Hjallerup | 8.1 | 145 | hard |
| Sulsted | 8.1 | 145 | hard |
| Ålestrup | 8 | 143 | hard |
| Hobro | 7.8 | 139 | hard |
| Aars | 7.7 | 138 | hard |
| Byrum | 5.3 | 95 | moderately hard |